diff options
| author | David Stevens <stevensd@chromium.org> | 2021-10-15 12:30:21 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-10-22 05:19:25 -0400 |
| commit | 1e76a3ce0d3cdfc6b506e21047a26471bc1cc92e (patch) | |
| tree | 44855eb8b79c5f2a487a1d403169a3578e48ef53 /arch/x86/kvm/mmu.h | |
| parent | 3f9808cac06c8dd4f800101e04f84fe3180198b0 (diff) | |
KVM: cleanup allocation of rmaps and page tracking data
Unify the flags for rmaps and page tracking data, using a
single flag in struct kvm_arch and a single loop to go
over all the address spaces and memslots. This avoids
code duplication between alloc_all_memslots_rmaps and
kvm_page_track_enable_mmu_write_tracking.
Signed-off-by: David Stevens <stevensd@chromium.org>
[This patch is the delta between David's v2 and v3, with conflicts
fixed and my own commit message. - Paolo]
Co-developed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/mmu.h')
| -rw-r--r-- | arch/x86/kvm/mmu.h | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h index 75367af1a6d3..2df48d60c949 100644 --- a/arch/x86/kvm/mmu.h +++ b/arch/x86/kvm/mmu.h @@ -304,14 +304,26 @@ int kvm_arch_write_log_dirty(struct kvm_vcpu *vcpu); int kvm_mmu_post_init_vm(struct kvm *kvm); void kvm_mmu_pre_destroy_vm(struct kvm *kvm); -static inline bool kvm_memslots_have_rmaps(struct kvm *kvm) +static inline bool kvm_shadow_root_allocated(struct kvm *kvm) { /* - * Read memslot_have_rmaps before rmap pointers. Hence, threads reading - * memslots_have_rmaps in any lock context are guaranteed to see the - * pointers. Pairs with smp_store_release in alloc_all_memslots_rmaps. + * Read shadow_root_allocated before related pointers. Hence, threads + * reading shadow_root_allocated in any lock context are guaranteed to + * see the pointers. Pairs with smp_store_release in + * mmu_first_shadow_root_alloc. */ - return smp_load_acquire(&kvm->arch.memslots_have_rmaps); + return smp_load_acquire(&kvm->arch.shadow_root_allocated); +} + +#ifdef CONFIG_X86_64 +static inline bool is_tdp_mmu_enabled(struct kvm *kvm) { return kvm->arch.tdp_mmu_enabled; } +#else +static inline bool is_tdp_mmu_enabled(struct kvm *kvm) { return false; } +#endif + +static inline bool kvm_memslots_have_rmaps(struct kvm *kvm) +{ + return !is_tdp_mmu_enabled(kvm) || kvm_shadow_root_allocated(kvm); } static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level) |